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December 3, 2020 37 min
Adventures in Freebernetes, tracing kernel functions, The better way of building FreeBSD networks, New beginnings: CDBUG virtual meetings, LibreSSL update in DragonFly, Signal-cli with scli on FreeBSD, and more. NOTES This episode of BSDNow is brought to you by Tarsnap (https://www.tarsnap.com/bsdnow) Headlines Adventures in Freebernetes: bhyve My Guest (https://productionwithscissors.run/2020/10/29/adventures-in-freebernetes-bhyve-my-guest/) Part 2 of experiments in FreeBSD and Kubernetes: Creating your first guest Tracing Kernel Functions: FBT stack() and arg (https://zinascii.com/2020/fbt-args-and-stack.html?s=03) In my previous post I described how FBT intercepts function calls and vectors them into the DTrace framework. That laid the foundation for what I want to discuss in this post: the implementation of the stack() action and built-in arg variables. These features rely on the precise layout of the stack, the details of which I touched on previously. In this post I hope to illuminate those details a bit more with the help of some visuals, and then guide you through the implementation of these two DTrace features as they relate to the FBT provider. News Roundup Dummynet: The Better Way of Building FreeBSD Networks (https://klarasystems.com/articles/dummynet-the-better-way-of-building-freebsd-networks/) Dummynet is the FreeBSD traffic shaper, packet scheduler, and network emulator. Dummynet allows you to emulate a whole set of network environments in a straight-forward way. It has the ability to model delay, packet loss, and can act as a traffic shaper and policer. Dummynet is roughly equivalent to netem in Linux, but we have found that dummynet is easier to integrate and provides much more consistent results. New beginnings: CDBUG virtual meetings (http://lists.nycbug.org/pipermail/cdbug-talk/2020-October/000901.html) I had overwhelmingly positive responses from the broader *BSD community about restarting CDBUG meetings as virtual, at least for now. Hopefully this works well and even when we're back to in-person meetings we can still find a way to bring in virtual attendees. LibreSSL update in DragonFly (https://www.dragonflydigest.com/2020/11/10/25143.html) DragonFly has a new version of libressl, noting cause it has a newer TLS1.3 implementation – something that may be necessary for you. Signal-cli with scli on FreeBSD (https://antranigv.am/weblog_en/posts/freebsd-signal-cli-scli/) So couple of days ago I migrated from macOS on Macbook Pro to FreeBSD on ThinkPad T480s. Beastie Bits Firefox is not paxctl safe for NetBSD (https://anonhg.netbsd.org/pkgsrc/rev/9386adbd052e) FreeBSD 12.2-RELEASE on Microsoft Azure Marketplace (https://azuremarketplace.microsoft.com/en-us/marketplace/apps/thefreebsdfoundation.freebsd-12_2?tab=Overview) Tarsnap This weeks episode of BSDNow was sponsored by our friends at Tarsnap, the only secure online backup you can trust your data to. Even paranoids need backups. Feedback/Questions carlos - BSD Now around the world (https://github.com/BSDNow/bsdnow.tv/blob/master/episodes/379/feedback/carlos%20-%20BSD%20Now%20around%20the%20world.md) paulo - freebsd on a Bananapi (https://github.com/BSDNow/bsdnow.tv/blob/master/episodes/379/feedback/paulo%20-%20freebsd%20on%20a%20Bananapi.md) paulo - followup (https://github.com/BSDNow/bsdnow.tv/blob/master/episodes/379/feedback/paulo%20-%20followup.md) Send questions, comments, show ideas/topics, or stories you want mentioned on the show to feedback@bsdnow.tv (mailto:feedback@bsdnow.tv) ***
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